1. Hauptman-Woodward Medical Research Institute, 700 Ellicott St., Buffalo, NY 14203, USA
2. Department of Structural Biology, University at Buffalo, State University of New York, 700 Ellicott St., Buffalo, NY 14203, USA
3. Department of Medicine, University at Buffalo, State University of New York, 3435 Main Street, Buffalo, NY 14214, USA
4. Department of Microbiology & Immunology, University at Buffalo, State University of New York, 3435 Main Street, Buffalo, NY 14214, USA
5. The Witebsky Center for Microbial Pathogenesis, University at Buffalo, State University of New York, 3435 Main Street, Buffalo, NY 14214, USA
6. Veterans Administration Western New York Healthcare System, 3495 Bailey Avenue Buffalo, NY 14215, USA